Evening Glenn, So far all I have done to the 31-15 is loosen it up with PB Blaster. Then I soaked it in sewing machine oil and run it for a while. I used a 1.5 amp machine motor just to turn her over and get all the old gunky joints loose. After wiping all the excess oil off the machine the brush paint job don't look as bad. My cookie sheets are coming in very handy.
David Hair